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Author
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Topic: oil pump hi vol vs stock
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Bakers67Coupe
Journeyman Posts: 56
From: Chandler,AZ,USA
Registered: Oct 2002
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posted 01-15-2004 11:40 AM
   
I am in rebuilding my first 351w. I had the block machined .030, decked and honed. I had the crank ground, polished, balanced and installed with KB hyper-utectic flat top pistons. Custom grind solid cam. Higher quality I-beam rods with ARP bolts. AOD high performance trans. I will be using the car for more street than strip but would like to run a few passes. Probably going with Trick flow heads, Performer RPM and 750cfm carb.
The question: What are the pro's and con's of high volume oil pump vs stock volume??? With new technology of oils and their increased efficiency, is a high volume pump necessary?
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http://members.cox.net/351w Deluxe Coupe 289 4v
Fact Air, Front Discs
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Pierre
Gearhead Posts: 541
From: Near Paris, France
Registered: Apr 2002
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posted 01-15-2004 12:00 PM
With your set-up and solid lifters, you should be able to use 100% synthetic oil (once engine is broken in, mineral 10W-30 during break-in). HV pump with thin oil will offer better cooling of rotating parts and longer engine life 
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BLstangin
Gearhead Posts: 765
From: St. James, MN
Registered: Apr 2002
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posted 01-16-2004 04:10 PM
What did you gap the top ring at? Look for the kb piston ring clearances topic in the Ford Racing forum. I may pull my motor apart and regap the top ring. Make sure that you do it right!------------------
1970 coupe restored with the help of my dad. 306 with 600 holley, Weiand Stealth intake, headers, Comp cam, harland sharp roller rockers, kb pistons, 11:1 compression ratio, pertonix ignitor 2 with matched coil, lakewood bellhousing, 4-speed toploader, and 2.79 open 8" rear. Soon to be 9" 3.50 trac-lok
1986 f-150, 5.0, factory towing package with original c-6 trans
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MustangOCD
Journeyman Posts: 18
From: Texas
Registered: Nov 2003
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posted 01-16-2004 08:27 PM
Cons: Higher volume means higher system pressure.Pros: Higher volume means increased lubrication at higher rpm. Since they are the same price, I went with a high volume in my 351w simply because the pros outweighed the cons. I have tremendous pressure (the needle is almost pegged at the high end), but I would rather have the extra lubrication at a higher rpm. I ran straight non-detergent 30W for break-in and I just switched over to 10W-30 Mobil 1 Drive Clean to clean it up a little before I run Mobil 1 Synthetic. Mobil 1 synthetic lubricates better AND it doesnt have as much oil pressure associated with it. So if you switch to Mobil 1 (as everyone should...), the higher pressure and the synthetic oil will offset each other evenly.
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RonnieT
Gearhead Posts: 827
From: Port Allen, La. 70767
Registered: Jun 99
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posted 01-17-2004 10:38 AM
Which ever pump you use just remember to get a good chrome moly oil pump drive shaft, I never use a stock one.I have always used HV oil pumps and never had an issue. ------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23
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68 S-code GT
Gearhead Posts: 2416
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 01-21-2004 07:33 AM
Not to change the subject but maybe to add a question! I noticed some listings for regular, high volume and high-pressure pumps in the Summit catalog. What is the high-pressure pump and wouldn?t a high volume pump create higher pressure?
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indyphil
Gearhead Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 01-21-2004 07:53 AM
The pump also needs a pressure relief valve. This way at low RPM its generating enough flow to keep pressure in the bearings. Then at high RPM instead of getting too much pressure the relief valve opens up and it bypasses some of the oil. I think the "high-pressure" pumps have a tighter relief valve and therefore generate more pressure.
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'68 coupe 289 C code
66 heads, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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Moneymaker
Administrator Posts: 25539
From: Lyons, IL, USA
Registered: May 99
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posted 01-21-2004 10:01 AM
High volume means exactly that.
MORE volume of oil. The rotor and case is actually BIGGER, therefore moves and displaces much more oil.
Our SP blue printed series HV pumps are the BEST money can buy.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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BLstangin
Gearhead Posts: 765
From: St. James, MN
Registered: Apr 2002
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posted 01-21-2004 01:49 PM
My dad told me a good analogy once and here it is: think of an oil pump like a garden hose. When you don't have anything blocking the end of the hose a lot of water comes out, but not at very much pressure. Now if you start to plug up the end of the hose with your finger you get a lot of pressure comming out the end, and it sprays a long ways, but not as much water is comming out of the hose. Oil pumps work the same way. It helped me understand. I use a high volume pump in my 302, but I have lose clearances, like .003 on the mains, and .002 on the rods. My dad has had one in his 302 in his daily driver truck for 35,000 miles with the stock oil pump drive shaft and hasn't had any problems. If I was you I would run a high volume pump and a chrome moly shaft and forget about it. My pumps are all mellings and I have never had a problem with one. Good Luck!------------------
1970 coupe restored with the help of my dad. 306 with 600 holley, Weiand Stealth intake, headers, Comp cam, harland sharp roller rockers, kb pistons, 11:1 compression ratio, pertonix ignitor 2 with matched coil, lakewood bellhousing, 4-speed toploader, and 2.79 open 8" rear. Soon to be 9" 3.50 trac-lok
1986 f-150, 5.0, factory towing package with original c-6 trans
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Tommy
Journeyman Posts: 59
From: loretto,tn 38469
Registered: May 2003
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posted 01-21-2004 09:16 PM
When I was rebuilding my 351W in my 65 I contacted Edelbrock about this same issue.I was using there Performer RPM cam.They recommended the stock oil pump.They claimed the high volume put to much stress on the cam and distributor gear.I have read this somewhere about the small block Ford and a high volume pump.I went with the stock pump and have 60lbs of pressure.I had a melling high volume in a 302 we redone,and didn't have any problems with it.------------------
65 coupe,351W,C4 TRANS,9in w/325 pos
(The Heartbeat Stops Here)
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